You run the risk of getting a crappy Chinese Dingoo when you buy from Ebay. Chinese Dingoo's are cheaper, why do you think the Ebay prices are lower?
It's not worth it just to save a few bucks, and no the seller probably doesn't know about these things, it seems like a lot of resellers don't.
At the end of the day, you usually get what you pay for...
So maybe i should buy it directly from Deal Extreme? And, in this case, am i sure that they are gonna send me the right one? (i mean the export unpawed version)